Welcome to the bench! Def. make sure you get a copy of your post-op report, it's always worth a read. Stay hydrated and take a deep breath, you did it!
I agree about the lemon. I had surgery back in March and the only thing that went down well was zero sugar pink lemonade. I loved that stuff. Now I drink water and diet gold peak tea. I had hiatal hernia surgery at the same time so getting stuff down was a big struggle until I healed. One day at a time it gets better.